Disagree. Quality engineers will ask for their worth regardless of location.
Also I think indexing on "less likely to job hop or negotiate salary" is short-sighted thinking. You're asking people to do a complex job where the key skill is critical thinking and self determination. Those skills go hand in hand with people willing to demand their worth from you. Sure, save a little bit of money now. But you're going to be building a brittle, disposable product with a brittle, disposable team for what ultimately will amount to a brittle, disposable company.